TODAYS MUOS1 COUNTDOWN

 HR:MM..Eastern...Event
T-6:20..10:15am...Countdown begins with rocket power up
T-5:30..11:05am...Weather briefing
T-4:55..11:40am...Start clearing assembly building area
T-4:20..12:15pm...C-band tracking beacon testing
T-3:40..12:55pm...S-band telemetry link checks
T-2:55...1:40pm...Establish blast danger area roadblocks
T-2:20...2:15pm...Weather briefing
T-2:15...2:20pm...Clear the pad
T-2:00...2:35pm...T-120 minutes and holding (for 30min)
T-2:00...3:00pm...Launch conductor briefing to team
T-2:00...3:02pm...Readiness poll for fueling
T-2:00...3:05pm...Resume countdown
T-1:50...3:15pm...Centaur LOX transfer line chilldown
T-1:43...3:22pm...Begin Centaur liquid oxygen loading
T-1:30...3:35pm...Begin Atlas first stage LOX loading
T-1:25...3:40pm...Centaur LH2 transfer line chilldown
T-1:10...3:55pm...Centaur RL10 engine chilldown
T-1:02...4:03pm...Begin Centaur liquid hydrogen loading
T-0:40...4:25pm...FLight termination system final test
T-0:16...4:49pm...RD-180 engine fuel fill sequence
T-0:10...4:55pm...Weather briefing
T-0:04...5:01pm...T-4 minutes and holding (for 10min)
T-0:04...5:08pm...Readiness poll for launch
T-0:04...5:11pm...Resume countdown
T-0:00...5:15pm..LAUNCH